Arab Strap Deeper

I'd been at my friend's house for dinner. My mum wanted me home early so I said I'd better go home. His sister said she was going anyway so she could walk me some of the way. And she knew a shortcut through the woods. She had long black hair, green eyes. I wish my friends could have seen me. We seemed to get on well on the way, considering the age gap. She was nineteen and I was almost fifteen.
She stopped by the river, And asked me to go swimming. I was a bit embarrased. I said no. But she said she would anyway, stepped back, and stripped. The sun was beginning to set, as she slipped into the water. And when she was in she kept teasing me, so I gave in. But I kept my pants on. The water was warmer than I'd expected. We swam around and played. She would push me under the water. I could feel her legs against mine underneath. She'd hold my arm. We must've been in about an hour.
I got out first. I leaned against a tree and put my trousers back on And then she got out of the river and walked towards me. She put her hands on the tree above my head and Pushed herself against me, and leaned down and kissed me. I don't know how long it lasted. Then she stepped back and bundled up her clothes and said "I'm sure you can find your own way from here". I ran back along the path. I was late home and I gave my mum some excuse. She believed it. Then the next day at school whenMy friend invited me round for dinner again I said 'No'.